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Sistrurus miliarius (Linnaeus, 1766) - Western Pygmy Rattlesnake


Collection Summary

Sistrurus miliarius (Western Pygmy Rattlesnake) has a total of 113 valid, non-duplicated collections representing 16 counties and 70 localities. There are a total of 44 collectors and 62 collection dates for the species. This results in a total of 70 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1900 and its most recent collection year is 2018. The earliest and latest collection dates (independent of earliest and most recent collection years) are April 1 and October 20, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Sistrurus miliarius (Western Pygmy Rattlesnake) by county. Some values are unavailable since some records are represented solely by historical literature reports, which sometimes lack complete collecting data. Click on a county name to view more information about that county. Click on column headings to sort by that column.
County Localities Collections Collectors Dates Expeditions Earliest Year Latest Year
Barry 3 5 5 5 5 1939 2014
Butler 2 2 1 2 2 1960 1962
Carter 2 9 4 3 4 1940 2008
Christian 5 9 8 5 5 1967 2008
Douglas 2 2 3 2 2 2008 2008
Howell 3 3 4 2 3 1938 1969
McDonald 1 1 1 1 1 2011 2011
Oregon 3 3 2 3 3 1900 1961
Ozark 10 18 9 10 10 1956 1998
Reynolds 2 3 3 3 3 1933 1938
Ripley 3 3 5 3 3 2008 2009
Shannon 6 6 6 6 6 1939 2017
Stone 4 10 3 6 6 1907 1931
Taney 9 13 8 10 11 1954 2018
Washington 2 2 2 2 2 1951 1951
Wayne 12 23 8 12 14 1933 2015